Surface			Permissible deviations				Explanation
Characteristic	Symbol for		Bearings of tolerance class1)
	characteristic	tolerance zone	Normal, CLN	P6	P5
Cylindrical seat							For normal demands	For special demands in respect of running accuracy or even support
Cylindricity		t1	IT5/2	IT4/2	IT3/2	IT2/2
Total radial runout		t3	IT5/2	IT4/2	IT3/2	IT2/2
Flat abutment
Rectangularity		t2	IT5	IT4	IT3	IT2
Total axial runout		t4	IT5	IT4	IT3	IT2

1. 1) For bearings of higher accuracy (tolerance class P4 etc.) please refer to the catalogue High-/super-precision bearings (table)